Flow condition sensor for infusion device

G - Physics – 01 – F

Patent

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Details

G01F 1/05 (2006.01) A61M 5/168 (2006.01) G01M 13/00 (2006.01) G08B 21/18 (2006.01)

Patent

CA 2475679

A device (10) for delivering fluid to a patient including an exit port assembly (70) adapted to connect to a transcutaneous patient access tool, a flow path (210) extending from the exit port assembly (70), and a flow condition sensor assembly (200) including a resilient diaphragm (220) having opposing first and second surfaces (222, 224). The first surface (222)of the diaphragm (220) is positioned against the flow path (210), and a chamber wall (226) is positioned adjacent the second surface (224) of the diaphragm (220) and defines a sensor chamber (228) against the second surface of the diaphragm (220). At least one sensor is arranged to provide a threshold signal when the second surface (224) of the diaphragm expands into the chamber (228) in response to at least one predetermined fluid flow condition occurring in the flow path (210).

L'invention concerne un dispositif (10) permettant de distribuer un fluide à un patient, qui comprend un ensemble orifice de sortie (70) destiné à être connecté à un outil transcutané d'accès à un patient, un chemin d'écoulement (210) s'étendant à partir de l'ensemble orifice de sortie (70) et un ensemble capteur d'état d'écoulement (200) doté d'une membrane résiliante (220) possédant une première et une seconde surfaces (222, 224) opposées. La première surface (222) de la membrane (220) est positionnée contre le chemin d'écoulement (210), et une paroi de chambre (226) est positionnée adjacente à la seconde surface (224) de la membrane (220) et définit une chambre de capteur (228) par rapport à ladite seconde surface de la membrane (220) (220). Au moins un capteur est agencé afin de fournir un signal de seuil lorsque la seconde surface (224) de la membrane se dilate dans la chambre (228) en réponse à au moins un état d'écoulement fluidique prédéterminé dans le chemin d'écoulement (210).

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